package com.ybb.seckilldemo.controller;

import com.ybb.seckilldemo.pojo.User;
import com.ybb.seckilldemo.service.IGoodsService;
import com.ybb.seckilldemo.service.Impl.UserServiceImpl;
import com.ybb.seckilldemo.vo.DetailVo;
import com.ybb.seckilldemo.vo.GoodsVo;
import com.ybb.seckilldemo.vo.RespBean;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.core.ValueOperations;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.CookieValue;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import org.thymeleaf.context.WebContext;
import org.thymeleaf.spring5.view.ThymeleafViewResolver;
import org.thymeleaf.util.StringUtils;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.util.Date;
import java.util.concurrent.TimeUnit;

@Controller
@RequestMapping("/goods")
public class GoodsController {

    @Autowired
    private UserServiceImpl userService;

    @Autowired
    private IGoodsService goodsService;

    @Autowired
    private RedisTemplate redisTemplate;

    @Autowired
    private ThymeleafViewResolver thymeleafViewResolver;

    /**
     * 跳转到商品列表
     * @param model
     * @param user
     * @param response
     * @param request
     * @return
     */
    @RequestMapping(value = "/toList",produces = "text/html;charset=utf-8")
    @ResponseBody
//    public String toList(HttpSession session, Model model, @CookieValue("userTicket") String ticket) {
//        if (StringUtils.isEmpty(ticket)){
//            return "login";
//        }
//        // 通过session获取
//        User user = (User) session.getAttribute(ticket);
//
//        if (null == user) {
//            return "login";
//        }
//        model.addAttribute("user", user);
//        return "goodsList";
//    }

//  使用redis 存储 后续改为MVC 拦截器 拦截未登录用户
    public String toList(Model model,User user,HttpServletResponse response,HttpServletRequest request) {
//        if (StringUtils.isEmpty(ticket)){
//            return "login";
//        }
//        // 通过userService获取
//        User user = (User) userService.getUserByCookie(ticket, request, response);
//
//        if (null == user) {
//            return "login";
//        }
        // 页面缓存
        // redis中获取页面，如果不为空，直接返回页面
        ValueOperations valueOperations = redisTemplate.opsForValue();
        String html = (String) valueOperations.get("goodsList");
        if (!StringUtils.isEmpty(html)) {
            return html;
        }
        model.addAttribute("user", user);
        model.addAttribute("goodsList", goodsService.findGoodsVo());
        // 如果为空，手动渲染，存入redis并返回
        WebContext webContext = new WebContext(request,response,request.getServletContext(),request.getLocale(),model.asMap());
        html = thymeleafViewResolver.getTemplateEngine().process("goodsList", webContext);
        if (!StringUtils.isEmpty(html)) {
            valueOperations.set("goodsList",html,60, TimeUnit.SECONDS);
        }
        return html;
    }

    /**
     * 跳转商品详情页面  页面静态化  前后端分离
     * @param goodsId
     * @return
     */
    @RequestMapping(value = "/detail/{goodsId}")
    @ResponseBody
    public RespBean toDetail(Model model, User user, @PathVariable Long goodsId){
        GoodsVo goodsVo = goodsService.findGoodsVoByGoodsId(goodsId);
        Date startDate = goodsVo.getStartDate();
        Date endDate = goodsVo.getEndDate();
        Date nowDate = new Date();
        // 秒杀状态
        int secKillStatus = 0;
        int remainSeconds = 0;
        // 秒杀还未开始
        if (nowDate.before(startDate)) {
            remainSeconds = (int) ((startDate.getTime() - nowDate.getTime()) / 1000);
        } else if (nowDate.after(endDate)) {
            // 秒杀已结束
            secKillStatus = 2;
            remainSeconds = -1;
        } else {
            // 秒杀进行中
            secKillStatus = 1;
            remainSeconds = 0;
        }
        DetailVo detailVo = new DetailVo();
        detailVo.setGoodsVo(goodsVo);
        detailVo.setRemainSeconds(remainSeconds);
        detailVo.setUser(user);
        detailVo.setSecKillStatus(secKillStatus);
        return RespBean.success(detailVo);
    }

    /**
     * 跳转商品详情页面
     * @param goodsId
     * @return
     */
    @RequestMapping(value = "/toDetail2/{goodsId}",produces = "text/html;charset=utf-8")
    @ResponseBody
    public String toDetail2(Model model,User user,@PathVariable Long goodsId,HttpServletResponse response,HttpServletRequest request){
        // 页面缓存
        // redis中获取页面，如果不为空，直接返回页面
        ValueOperations valueOperations = redisTemplate.opsForValue();
        String html = (String) valueOperations.get("goodsDetail:" + goodsId);
        if (!StringUtils.isEmpty(html)) {
            return html;
        }
        model.addAttribute("user", user);
        GoodsVo goodsVo = goodsService.findGoodsVoByGoodsId(goodsId);
        Date startDate = goodsVo.getStartDate();
        Date endDate = goodsVo.getEndDate();
        Date nowDate = new Date();
        // 秒杀状态
        int secKillStatus = 0;
        int remainSeconds = 0;
        // 秒杀还未开始
        if (nowDate.before(startDate)) {
            remainSeconds = (int) ((startDate.getTime() - nowDate.getTime()) / 1000);
        } else if (nowDate.after(endDate)) {
            // 秒杀已结束
            secKillStatus = 2;
            remainSeconds = -1;
        } else {
            // 秒杀进行中
            secKillStatus = 1;
            remainSeconds = 0;
        }
        model.addAttribute("remainSeconds", remainSeconds);
        model.addAttribute("secKillStatus", secKillStatus);
        model.addAttribute("goods", goodsVo);
        // 如果为空，手动渲染，存入redis并返回
        WebContext webContext = new WebContext(request,response,request.getServletContext(),request.getLocale(),model.asMap());
        html = thymeleafViewResolver.getTemplateEngine().process("goodsDetail", webContext);
        if (!StringUtils.isEmpty(html)) {
            valueOperations.set("goodsDetail:" + goodsId, html,60, TimeUnit.SECONDS);
        }
        return html;
    }

}
